Boomerang



FIG. 1 is a top plan view of a boomerang showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an side elevational view thereof from the opposite side of that shown in FIG. 2; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a boomerang, as shown and described. 